As an important part of the U.S. global hegemony after the Cold War, Long arm jurisdiction is a kind of superpower’s judicial bullying to the rest of the world. Although it looks like humane and legal due to the complex system design, yet it is a kind of coercion policy essentially, with the purpose to force or deter other countries to act in accordance with the rules and interests of the United States. The Long arm jurisdiction policy of U.S. is based on its super-capability in financial, intelligence, military, technology, judicial and allied systems. In contemporary international politics, the behavior of long arm jurisdiction that transcends the sovereignty of nation-states is highly controversial at the theoretical, moral, and practical levels. After the Trump administration defines China as a "strategic competitor", the US policy of long arm jurisdiction towards China has become politicized and radicalized gradually. In the context of new Sino-American relationship, we may need to re-think the U.S. long arm jurisdiction policy from a different perspective and respond to its potential consequences actively.